Being able to move bases hinges more on the defeat of the native boss, the construction of a meat workbench(for those who wish to avoid it) is irrelevant to it. Once you beat him a green fog circle should appear next to the bonfire at the beach, touching that triggers a dialogue that enables you to craft a blue flag from the iron workbench. Place that flag at an ideal location to have your main base(default respawn, free fast travels) be that location. Interact with the flag to call your other protag to that location, your constructions and villagers have to be manually transported if you care to. Raids, i believe, target specifically a villager and spawn in nearby to that villager, so moving your main base won't stop raids from targeting villagers outside it, i think.